Gearshift Housing

Fig. 2 Gearshift Housing Asssembly:

1. Install interlock levers on pivot pin and retain with E-ring, Fig. 2. Use pliers to install spring on interlock lever hangers.
2. Lubricate and install new O-rings on shift lever shafts. Lubricate housing bores and push shafts into proper bore.
3. Install operating levers and torque retaining nuts to 18 ft. lbs. On overdrive units, ensure the 3rd-overdrive points downward.
4. Rotate shift fork bores to neutral position and install the 3rd-4th shift fork or the 3rd-overdrive shift fork in proper bore and under both interlock levers.
5. Position both synchronizer sleeves in neutral and place 1st-2nd shift fork in the 1st-2nd synchronizer sleeve groove.
6. Lay transmission on its right side and place gearshift housing gasket on case with grease to hold in position.
7. Lower gearshift housing into place, guiding the 3rd-4th shift fork or the 3rd-overdrive shift fork into synchronizer groove, and lead the 1st-2nd shift fork shaft into the 1st-2nd shift lever bore. Raise interlock lever against its spring tension with a screwdriver, allowing 1st-2nd shift fork shaft to slip under the levers. the gearshift housing should now seat against case gasket.
8. Install gearshift housing attaching bolts finger tight and shift transmission through all gears to insure proper operation. Eight gearshift housing attaching bolts are shoulder bolts used to accurately locate the mechanism on the transmission. One bolt shoulder is longer and acts as a dowel, passing through the cover and into the case at center of rear flange. Two bolts are of standard design, located at the rear of cover.
9. Torque gearshift housing attaching bolts to 15 ft. lbs.
10. The reverse shift lever and the 1st-2nd shift lever incorporate cam surfaces which mate in the reverse position to lock the 1st-2nd lever, fork and synchronizer in the neutral position. To check, place transmission in reverse, then while turning input shaft, move 1st-2nd lever in each direction. If input shaft lock becomes difficult to turn, the synchronizer is partially engaged, caused by excessive cam clearance. Install a new 1st-2nd shift lever of different size. If insufficient cam clearance exists, it is difficult or impossible to shift into reverse.
11. Lubricate reverse shaft and install operating lever, then torque attaching nut to 18 ft. lbs.
12. Install speedometer drive pinion gear and adapter, ensuring range number (indicating number of teeth) is in the 6 o'clock position.